Made in Germany of 6/4 titanium, some said Marcel Hahn’s Singlestar cogs were dead sexy to begin with. With the (claimed) ability to “turn a common or garden bicycle wheel into a top quality and also very light single-speed bicycle wheel in next-to-no time,” the broad-based cogs are reversible and said to be very long-wearing. Given tooth profiles developed in partnership with Bernd Rolhoff and sizes ranging from 15-24t, what more could one ask for?

Starburst stylee

How about a touch of colour? These photos show the two sides of a single 21t cog, shining “like the lettering on the ring from Lord of the Rings.” Based on our Google-assisted translation from the German, the Ti-dye is a no-cost option for any new cog order. Lest existing customers miss out, Hahn will even take back, clean, and dye customers’ used cogs.